In this Jan. 10, 2010 file photo, then New Jersey Gov. Jon S. Corzine answers a question during an interview with the Associated Press, in Trenton, N.J. MF Global, the securities firm led by Corzine, broke rules requiring it keep clients' money and company funds in separate accounts, the head of the Chicago Mercantile exchange said Tuesday, Nov. 1, 2011.

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Gary Gensler, the regulator overseeing the investigation of Jon Corzine’s collapsed securities firm, built close ties to Corzine as they rose through the ranks of Goldman Sachs. Later, they collaborated on Capitol Hill to pass an anti-corporate fraud law.